[monkeylantern]

I recognise most of the 15,000 sounds from the stock sound effect files nearly 90% of films, adverts, and tv use. I can pick out a couple of dozen per hour of US primetime drama, usually.

Someone is the graphics field can easily do the same. You will get caught.

 

[monkeylantern]

Would you like it if someone took all your designs, spent 10 minutes in Photoshop tweaking them, and then sold them as their own?

C&D letters are a lot more common than you think.